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  <title>IsHole</title>

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  <h1>PolyNode.IsHole</h1>


  <p class="Decl"><span class="Comment">Del.&raquo;</span> IsHole: Boolean; <span class="Comment">//read only</span></p>

  <p class="Decl2"><span class="Comment"> C++&nbsp;&raquo;</span> bool IsHole; <span class="Comment">//field</span></p>

  <p class="Decl3"><span class="Comment"> C#&nbsp;&nbsp;&raquo;</span> <b>public <span class="CSharp">bool</span></b> IsHole; <span class="Comment">//read only property</span></p>


  <p class="Body"> Returns true when the PolyNode's polygon (<a href="./Contour.htm">Contour</a>) is a <a href="../../../../../Overview/_Body.htm#terminology">hole</a>.<br><br> Children of <em>outer</em> polygons are always <em>holes</em>, and children of <em>holes</em> are always (nested) <em>outer</em> polygons.<br> The IsHole property of a <a href="../../PolyTree/_Body.htm">PolyTree</a> object is undefined but its children are always top-level <em>outer</em> polygons. </p>

  <h2 id="Auto-SeeAlso">See Also</h2>
  <p class="Body"><a href="../../../../../Overview/_Body.htm">Overview</a>, <a href="Contour.htm">Contour</a>, <a href="../../PolyTree/_Body.htm">PolyTree</a></p>
    
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